Other performers included Selena Gomez, Enrique Iglesias and Robin Thicke, who asked the crowd: "I wonder who Miley Cyrus will twerk on tonight?"

Ariana Grande shined as she belted songs such as "The Way" and "Honeymoon Avenue" in Mariah Carey form. Girl group Fifth Harmony also impressed vocally, while Macklemore & Ryan Lewis and Pitbull ignited the crowd during their high energy sets.